<?php
    require_once "core/main.php";
?>
<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <link rel="stylesheet" href="css/style.css"/>
</head>
<body>
    <?php
        $showCalc->calcArea(
            array(
                $showCalc->showInput($txt),
                $showCalc->write(),
                $showCalcO->write()
            )
        );
    ?>
</body>
</html>
